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by Hardware_man
Sun Apr 07, 2013 5:58 pm
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 99071

Re: Camera Interface Specs

JamesH wrote, “Not my call I’m afraid (universal video input)” Hardware_man... Then I request that you pass this information to the people who do make these decisions quickly. I agree I’m using a lot of speculation, but I suspect current geo-political conditions open the window right now for this to...
by Hardware_man
Sat Apr 06, 2013 3:13 pm
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 99071

Re: Camera Interface Specs

JamesH,

Due to current geo-political issues, it is possible that Samsung might face delays getting their latest smart phones to market. If this is true, and if this relaxes some of Broadcom’s time frames, this might be a good time to get a universal video input driver written.

Hardware_man
by Hardware_man
Wed Mar 27, 2013 6:45 pm
Forum: Camera board
Topic: Driver for Aptina AR0330 image sensor with MIPI CSI-2
Replies: 20
Views: 8440

Re: Driver for Aptina AR0330 image sensor with MIPI CSI-2

James,

You forgot to mention infinite budget :D

What if this function were only for "pre tuned" video?

I basically want to take an "off the shelf" camera that has already processed the pixel data up to "tuned" video. I just want to get "straight threw" the ISP to the H.264 encoder.

Hardware_man
by Hardware_man
Wed Mar 27, 2013 4:22 pm
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 99071

Re: Camera Interface Specs

The USB specification has limits on cable lenght. I don't remember off the top of my head what it is, but you can easily find the USB 2.0 specification on line. Ethernet is designed to work with very long cable lengths. The Pi board is small. For security camera applications, put a Foundation camera...
by Hardware_man
Tue Mar 26, 2013 1:14 pm
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 99071

Re: Camera Interface Specs

Does OpenELEC add support for non compressed video input to the Pi?

Hardware_man
by Hardware_man
Sun Mar 17, 2013 6:29 pm
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 99071

Re: Camera Interface Specs

If you look a few pages back in this thread, I have discussed using USB as a camera input for non compressed video. 720P (720 x 1280) at 29.97 FPS, 16 bits per pixel Y Cb Cr is right around the theoretical USB2.0 maximum data rate. JamesH pointed out that USB has a lot of overhead so you probably wo...
by Hardware_man
Sat Mar 16, 2013 3:58 pm
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 99071

Re: Camera Interface Specs

When I said, “Don’t blame the 1%, blame the bizarre” this is what I meant. I’ll bet the Foundation gets requests for new firmware every day. They couldn’t possibly write firmware for each request. So they have to prioritize. If maybe 100 people (the “bizarre”) all added to this thread and all said a...
by Hardware_man
Fri Mar 15, 2013 3:08 pm
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 99071

Re: Camera Interface Specs

I really don’t want to get into a political discussion of the 1% vs the 99%. And I’m not going to quit my job as an engineer to become a Wall Street Occupier. I like running water and central heat too much ;.) What I do want is a real time H.264 encoder. Actually, as I have searched for a real time ...
by Hardware_man
Wed Mar 06, 2013 3:27 pm
Forum: Camera board
Topic: Driver for Aptina AR0330 image sensor with MIPI CSI-2
Replies: 20
Views: 8440

Re: Driver for Aptina AR0330 image sensor with MIPI CSI-2

Llya, Read through my post in this section “Camera Interface Specs”. I go back and forth with JamesH to try to get a driver for a “universal” input, like an add on HDMI input board. After 8 pages, you will see the futility of trying to get any video input device other than the Foundation’s camera to...
by Hardware_man
Wed Feb 20, 2013 4:10 pm
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 99071

Re: Camera Interface Specs

B1234, The more I think about it, the Pi actually is the “Ferrari”, not the “Nissan Micra”. Broadcom got a design win for a Samsung smart phone. That is huge when you consider, Samsung chose the Broadcom GPU over their own GPU. All that I can speculate is that Broadcom must have an excellent H.264 a...
by Hardware_man
Mon Feb 18, 2013 6:35 pm
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 99071

Re: Camera Interface Specs

From Broadcom’s point of view, selling chips is selling chips. In this thread, I am talking about an add on board for the “universal” video in function, not redoing the Pi board to add this function. So the added cost would only be for people who want to buy the additional “universal” video in optio...
by Hardware_man
Sat Feb 16, 2013 6:27 pm
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 99071

Re: Camera Interface Specs

JamisH, As I have said, I would convert HDMI (or maybe DVI or even analog component) to CSI-2 in an add on hardware board. I was under the impression that the problem was getting through the ISP. Do I understand correctly, the ISP is the Input Signal Processor and this is where a camera CCD is tuned...
by Hardware_man
Fri Feb 15, 2013 7:49 pm
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 99071

Re: Camera Interface Specs

I would love that for 2 reasons:

1. I want the DVR that I have been talking about in this thread.

2. I worked for NTI for one week (they make KVM boxes). That was the only time in my many years that I walked away after 1 week hateing the owner :D

Hardware_man
by Hardware_man
Thu Feb 14, 2013 4:01 pm
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 99071

Re: Camera Interface Specs

Alfadaz,

Thank you for thie reply. How will that work? Maybe 4 GPIO pins to control 16 levels of digital zoom or 8 pins for 256 levels or something like that?

Hardware_man
by Hardware_man
Fri Feb 08, 2013 6:01 pm
Forum: Camera board
Topic: STICKY: Foundation (old) Camera Board information
Replies: 446
Views: 341850

Re: Foundation Camera Board information

Jim, As best as I understand it (I’m a hardware engineer, not a software engineer so maybe my understanding isn’t the best), a lot of the information anyone would need to use a different camera, or any video source for that matter, is Broadcom company confidential. Over time, the Foundation is mappi...
by Hardware_man
Fri Feb 08, 2013 5:01 pm
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 99071

Re: Camera Interface Specs

Will it be reasonably easy to map control of digital zoom to a Pi serial port?
by Hardware_man
Fri Feb 08, 2013 4:55 pm
Forum: Camera board
Topic: STICKY: Foundation (old) Camera Board information
Replies: 446
Views: 341850

Re: Foundation Camera Board information

Jim JKla, See my post in this section “Camera Interface Specs” I go back and forth with JamesH over many details of attempting to use a different camera over 7 pages. We primarily discuss using a camera module that is already tuned. Note, there is a LOT more to it that getting the CSI-2 connections ...
by Hardware_man
Fri Feb 08, 2013 3:33 pm
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 99071

Re: Camera Interface Specs

JamesH,

When the camera is available, will it be possible to do digital zoom?

Hardware_man
by Hardware_man
Tue Feb 05, 2013 6:21 pm
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 99071

Re: Camera Interface Specs

The only thing the CPU has to do is move data from USB to H.264 in and move data from H.264 out to SD card. I wouldn't ask the CPU to do any other thing, shut down all other interrupts. Still impossible?
by Hardware_man
Tue Feb 05, 2013 4:18 pm
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 99071

Re: Camera Interface Specs

Well, was a nice idea while it lasted. :cry: I don’t know the internal structure of the Broadcom chip all that well. Broadcom would probably have to shoot me if I did. :D So if we are talking 16 bit bytes, then I agree with your numbers. I didn’t know if there was some kind of DMA “pipeline” between...
by Hardware_man
Tue Feb 05, 2013 3:19 pm
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 99071

Re: Camera Interface Specs

Jamesh, Gert van Loo says that proper layout guidelines were followed with the routing of the USB differential pares. Thus, it is reasonable to assume that if I use only 1 USB port and do not use the other USB port or the Ethernet, then I can expect to get full USB2.0 high speed 480 M bps. And USB2....
by Hardware_man
Mon Feb 04, 2013 6:21 pm
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 99071

Re: Camera Interface Specs

When the Foundation did the PCB, did they use controlled dielectric / controlled impedance techniques on the USB differential pair lines from the connectors to the hub and from the hub to the Broadcom chip to maintain the USB 90 ohm differential impedance?
by Hardware_man
Mon Feb 04, 2013 5:08 pm
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 99071

Re: Camera Interface Specs

JamesH, I thought about what B1234 said again. If I use 720P mode in my camera (720 x 1280) at 30 FPS, I just make it at USB2.0 speed 720 x 1280 x 16 x 30 = 442.4 M bps. And USB2.0 is specified for 480 M bps maximum. Maybe just enough overhead left for Vsyns, H sync, Frame, sync, etc. As the Pi is s...
by Hardware_man
Mon Feb 04, 2013 4:50 pm
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 99071

Re: Camera Interface Specs

B1234,

So your suggesting I use the Ethernet input and record to the Pi SD card that way? But I would need a camera that already does some compression to get the data rates down to the Ethernet speed.

Hardware_man
by Hardware_man
Mon Feb 04, 2013 4:45 pm
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 99071

Re: Camera Interface Specs

WOW! That must have had some “serious” data throughput.

Assuming 16 bits per pixel at 30 fps, that’s 41E6 x 16 x 30 = 19.7 giga bits per second! Can CSI-2 handle that? Did you need all 4 LVDS data lanes (you only bring 2 LVDS data lanes out to the CSI-2 connector on the Pi)?

Hardware_man

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